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LFT Test Cost & Labs

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Frequently Asked Questions About LFT Test

What is a Liver Function Test / LFT?

Liver function test is a panel of tests that tell you about the functioning of your liver. This is a blood based test where a technician or a phlebotomist will take your blood sample to do the testing.

Liver function test diagnoses the liver diseases by measuring the levels of proteins, liver enzymes and bilirubin in your blood.

What are the parameters covered in liver function test?

Liver function test consists of testing multiple parameters that helps in evaluation, detection and monitoring of liver diseases or damages. It includes the following parameters

Why is the liver function test important?

Uses of LFT Test.

Liver is considered the workhorse of our body performing various important functions including conversion of fats, carbohydrates and proteins, being a storehouse of some vitamins and, metabolism of certain hormones. Its functioning impacts most body functions in one way or the other. Some of the other functions of liver include:

Converts carbohydrates and some amino acids into glucose which gives energy to the body

Works on the proteins to make them usable for the body

Helps in the breakup of waste materials that is then passed out of the body through urine

Processes alcohols and various medicines including antibiotics

Processes certain hormones including the thyroid hormones and estrogen

Contributes to the production of Vitamin D in the body along with skin and kidneys

Helps in the formation of cellular components of blood

Many of us abuse the liver through our own voluntary actions like excessive alcohol drinking or eating unhealthy food. Unfortunately, there are also things which are beyond our control that are harming our liver irreparably.

The chemical laced food that has become commonplace in our country, where regulation implementation is really lax, harms ours liver. Additionally, some medicines impact liver function, as a side effect. The author knows of a relative, who was on Parkinson’s medication.

The doctor failed to mention that the medicines for Parkinson’s disease can cause liver damage. The relative died of liver cirrhosis when a simple liver function test could have identified the problem earlier and remedial steps could have been taken.

Who should get tested for liver dysfunction?

In the Indian context, it is recommended that all individuals above the age of 30 should get a liver function test done as a part of annual preventive health check up. People who have the following symptoms or attributes should consider getting a liver function test done at regular intervals.

Weakness, fatigue or loss of energy

Yellow skin or eyes

Abdominal pain

Weight loss

Family history of liver disease

Alcoholism

Too much eating of fast food

People of regular medication for diseases like Parkinson’s

Liver Function Test.

Why is the liver function test done?

Liver dysfunction or failure mostly occur over a period of time and hence it is difficult to diagnose. There is one exception though called acute liver failure when the deterioration of liver happens rapidly. Liver function test is often recommended to diagnose the liver infections and liver diseases.

Some of the different kinds of liver diseases and reasons for their onset are given below:

Fatty Liver:

This condition is caused by accumulation of excess fat in the liver. When the fat % in liver exceeds 5%, it is considered the onset of fatty liver disease. Obesity or being fat is the primary reason for developing fatty liver. Excessive consumption of alcohol and some genetic factors can also cause this condition. Fatty liver in itself is generally not a huge cause of concern but it makes liver vulnerable to other infections and diseases and hence should be promptly addressed in consultation with your doctor. Symptoms of fatty liver are

Weakness

Mild Abdominal Pain

Weight Loss

Confusion

Inflammation may occur which the doctor can identify through physical examination

Cirrhosis of liver:

Liver cirrhosis is the permanent scarring or damage to the liver. This is a non reversible disease which progresses and covers liver over a period of time. Liver cirrhosis can be life threatening and require immediate attention. It results in liver slowly losing its capacity to cleanse the body.

The toxic build up will start to occur which will lead to retention of water in legs and rest of the body. Over a period of time, the patient’s personality will start changing, he will become forgetful and sleep patterns will get impacted. In the later stages, internal bleeding and coma may occur. Signs of liver cirrhosis include:

Fatigue

Nausea

Weight Loss

Loss of Appetite

Yellowness in Eyes

Key reasons causing liver cirrhosis are excessive alcohol consumption, genetic factors or viral infections. Sometimes, the medicines of certain diseases like Parkinson’s are also known to cause liver dysfunction perhaps leading to cirrhosis.

Liver Cancer:

There are different kinds of liver cancers and the causes of liver cancer vary. Since liver receives blood from various organs of the body, cancer from other organs may impact liver.

Liver cancer can be caused by excessive alcohol consumption, certain types of viral infections including Hepatitis B and due to genetic factors. People with liver cirrhosis have a higher chance of developing liver cancer.

There are also many other kinds of liver diseases or liver dysfunctions.

Causes of liver damage which may lead to serious liver diseases.

Is there any preparation before the test?

As it is a simple blood test, there is no special preparation required before the test. Your doctor may advise you not to take some food or medications that may affect the protein or enzyme levels in your blood. Some doctors may ask to fast for some period of time prior to the test.

What is the procedure of LFT test?

Liver dysfunction can be tested through a basic blood test called liver function test. This test can be a part of preventive health check up or is prescribed by doctors as the first screening test.

During the test, a healthcare professional will clean your skin with an antiseptic so that the microorganisms present in your skin will not affect. Then, he will wrap an elastic band around your arm to easily access the veins swollen with blood.

He will draw blood samples using a needle and cleans the injected area with cotton to stop bleeding. The blood samples taken will be sent to the lab for analysis.

It usually takes a few minutes to complete this test. Home collection can be arranged if you don’t have time to visit the lab.

What does the test result interpret?

Type of liver condition or disease

ALT and AST

Bilirubin

ALP

Albumin

PT

Acute liver damage

Usually greatly increased

Normal or increased

Normal or moderately increased

Normal

Normal

Chronic forms of various liver disorders

Mild or moderately increased

Normal or increased

Normal to slightly increased

Normal

Normal

Alcoholic Hepatitis

AST is moderately increased, usually at least twice the level of ALT

Normal or increased

Normal or moderately increased

Normal

Normal

Liver Cirrhosis

AST is usually higher than ALT

May be increased

Normal or increased

Normal or decreased

Prolonged

Normal Range of Liver Function Test Parameters

Normal blood test results for typical liver function tests include:

ALT. 7 to 55 units per litre (U/L)

AST. 8 to 48 U/L

ALP. 45 to 115 U/L

Albumin. 3.5 to 5.0 grams per decilitre (g/dL)

Total protein. 6.3 to 7.9 g/dL

Bilirubin. 0.1 to 1.2 milligrams per decilitre (mg/dL)

GGT. 9 to 48 U/L

PT. 9.5 to 13.8 seconds

These results are for a typical male. Normal results vary from lab to lab and might be slightly different for women or children. LFT test results are generally available within a day.